Demountable rim.



P. E. DOOLITTLE DEMOUNTABLE RIM.

APPLICATION FILBD AUG. zo, 1906.

Patented July 25, 1911.

WTNESSES.- a

1 INVENTOR.

, f ZMP/ l l NTFLD STATES FFlQF.

PERRY E. DOOLITTLE, OF TQRCNTO, ONTARIO, CANADA, ASSIGNOR, B Y' B'ESNEASSIGN- MENTS, TO DOOL'ITLE T {M C0., LTI).

DEMOUNTABLE RIM.

To all whom t' mfr/y concern:

Re it known thatv l'. Panni' E. DooLrrTLE. ot the city of Toronto. inthe Province oit Ontario. anada, have invented certain new and uset'ulImprovements in I`)en'1onntahle Rims. ot` which the following is aspecification.

My object is to devise simple means for carryingpneumatic tires detachedin such a condition that they may he very quickly placed in position onand' secured to the wheels, and l attain my object by providing the tirewith ademountable rim extensible and contraetihle circmnterentially on atixed rim, means being` provided tor holdin-g the demountahle rimexpanded lor 'for releasing it to permit of'its' contraction on thelixed rim substantiallyas hereinafter more specifically described, land'then definitely claimed.V

Figure l isa cross-section ot af demount alole rim constructedlinaccordance with my invention. F ig. 2 is a cross section ot a rim of thetype shown .in Fig. 3 taken through the lock shown in Fig. Fig'. f3 is acrosssection ot a modified form ot' my invention. Fig. 4f, is `a sideelevation, partly in section, of part ot" the demonntable rim shown inFig. 2.` Fig'. 5 is an underside plan vieiv showing the construction andarrangementofthe lock tor the demonnt'able rim. Fig. 6 is a' sectionalview of the lock for the inner band shown in Fig'. Fig. 7 is a plan viewof the' ends of the inner band shown inFig. 8.

In the drawings like letters of reference indicate corresponding partsin the different figures. y

On referring to the drawings itA will be seen that the device comprisesthree main parts, the tire A. the demonntalole rim C and the fixed rimE. The tire generally is provided with an inner tithe B. Thedemountahlerim is divided transversely and its ends overlapped as shownyin Figs. 4 and 5, so that Vthe. hand .may be extended and contractedcircumferentially. Means, which I Will hereinafter describe, areprovided whereby the demonntahle rim may be held extendedl or permit-tedto contract. These means may also be arranged to effect the contractionindependent ot the air pressure in the tire. The lixed metal rim E istitted on the Wooden telly D.

In Fig'. 1 I' show a tire of the Dunlop type. In this torni the tire isprovided with Specification of Letters Petent.

Application led August 20, 1906.

Patented July 25, 1911., serial No. 331,271.

| viuexteusihle edges .F and the demonntable rini (l is U-shapcd incross section.

- llvhile. various means may he provided 'tor holding the demountahlerim extehded and tor permitting;y il' to contract.7 l prefer thearrangement shown in the details. One end of the deniountahle rim has atongue Gr secured thereto. andthe other end of the rim has a groovedpart H t'orincd thereon into which the tongue G is tittedts shown. Afterthe tire has been fitted on the dei'nountahlo rim the parts G and H beforced apart to extend the rim by means ot" any suitable tool. To holdit extended I provid a ivedee l which may he driven int-0 suitablyshaped holesv l formed in the t'ork li and againstthe end K of thet-onrg'u'eG. The tire. may he noiv fully inflated it desired and carriedon thecar ready for use. When it is desiredv to attach it. to the wheelit is simply slipped on tothe latter from one' side, prcsmning, ot'course, that the old tire has already heen removed. As soon as thedemonntablc rim is in the proper position relative to the tlxed rim thewedge I may be Withdrawn. The air pressure in the tire will then causethe demoiintable rim to contract. ln some cases this contraction may besu'tlicient to hold the demountable rim on the tixed rim. but l preferto provide-in the tongue Gand part H the holes L and M. lVhen thedemountable rim has been contracted hy the air pressure or otherwise tomake nearly a tight tit on the fixed rim, the holes L and M approximatethe position shown in Fig. 5; then hy driving in the irc-deje the forliand the grooved partmay he drawn together to dran' the holes L and Minto alinement when the band Will be absolutely tight on the telly. InFig. 3 I

shoiv a tire otl the well known standard clencher pattern. thedeinountable rim C is of course suitahlytitted to the base of the tire,but in other respects does not differ from the rim shown in Fig. l. Toprevent side motion otl the demountable rim when in place on the fixedrim I provide an annular projection O, which when the demountable rim isexpanded Will slip over the fixed rim and come into alinement with aslight depression in the fixed rim. When the demountalole rim iscontracted the pro jection enters this depression and securely holds thedemountable rim in place.

To properly hold the base of Vthe clencher l lapped. One end is providedwith a hole a fixed rim the air pressure ot' the inner tube `Jcire inthe demountable rim I provide the inner band I divided to make itexpansible and contractible and having its ends overand the other endwith a slot Z). rIhrough the hole'and slot is passed the valve stem Q. Anut or shoulder c is placed or formed on the stem and lies on top of theband I. Below the band is placed a washer Z and below the washer atubular nut c is screwed on the stem. While the tire is deflated theband is readily expanded to'perniit ot the base of the tire being put inplace. on the vdemountable rim. When the tire is in place and thedemountable rim contracted on the will have contracted the band and itmay be held contracted by tightening up the nute. Then in case of a tirebursting it will still be securely held to the rim by. the band. Theends of the band may be corrugated as shown to increase the security ofthe clampln Figs. 1 and 3 I show a band of conipressed ber for otherslightly elastic material on the fixed rim giving a good frictionalgrip. This greatly adds to the security of the device, aids inpreventing rust in the oint, and prevents noise.

' The advantages of my device are many and obvious. In mostl standardtypes of tire considerable dilliculty is experienced in replacing thetire, owing to the fact that in most cases the tire bases require to bestretched over the rim' with which it is en gaged; By 'my constructionthe tire may be carried with the demountable rim extended' so that itmay be readily slipped on the fixed rim and subsequently secured inposition as described. Further, as the tire and demountable rim whendetached form a coniplete structure the tire may be fully inflated'before it is placed in position on the wheel, thus the chauffeur isalways aware before he places a new tire von the wheel whether or not itis in proper condition to hold air. In using tires which are normallycarried deflated and cannot be properly inflated until placedin positionon the wheel; the chauffeur is only able to ascertain whether or not histire is air tight after he has spent a great deal of time and labor inplacing it inposition on the wheel. It will be seen too that my tire maybe placedin position and removed in a small fraction of the timeordinarily required to replace tires, owing to the fact that there areno bolts employed, and that all the labor of stretching a heavy tireinto position over a rim of 'greater diameter than the innercircumference of the tire base is saved. Also, as the fork II and tongueK are on the under side of the demountable rim, they must be received ina recess in the fixed rim and felly. The fasl tenings of the band arethus entirely within l the outer periphery of the fixed rini andcompletely protected from accidental damage.

lVhat I claim' as new and desire to secure byLett-ers Patent is l. Avehicle wheel provided with an an-y nular demou'ntable rim dividedtransverselyandv having its 'ends overlapped, the said rim havingclencher side flanges; a tire cover provided with a clencher baseengaging the aforesaid flanges; an inner expansible and contractibleband engaging the clcncher l tire base; and an inner air tube,substantially as described.

2. A vehicle wheel provided with an annular vdemountable rim dividedtransversely and having its ends overlapped, the said rino havingclencher side flanges; a tire cover provided with a clencher base engaging the aforesaid flanges; an inner expansible and contractible bandengaging the clencher tire base, and having its ends overlapped; andmeans for clamping the ends together, substantially7 as described.

3. A veh', cle wheel provided with an annular demountable rim dividedtransversely 1 and having its ends overlapped, the said rim `havingclencher side flanges; a tire cover provided `with a clencher baseengaging the aforesaid flanges;v an` inner expansiblc and contractibleband engaging the clencher tire base and having its endsv overlapped;and a valve stem adapted to clamp the said ends together, substantiallyas described. ,v

4. A vehicle wheel provided with an annular demountable rim dividedtransversely and having its ends overlapped, the said rim havingclencher side flanges; a tire cover provided with a clencher baseengaging the aforesaid flanges, an inner expansible and contractibleband engaging the clench`e1" tire base and havin(r its ends overlapped;a valve stem adapted to clamp the said ends together; andl means forclamping together the ends of the outer band. substantially asdescribed.A

5. In a vehicle wheel having a demountable rim, the combination of atire: an annular expansible demountable rim adapted to 'engage theunderside of the base of the tire; a substantially cylindrical facednula-r expansible deinountable rim adapted to engage the under side ofthe base of the tire; a substantially cylindrical faced fixed rim lessin circumference externally than the inner face of the demountable rimwhen the latter is expanded and having a recess formed therein; andmeansin permanent operative connection with the demountable rim forholding the latter expanded and for contracting the said demountabie rimon the xed rim, the said means being received in the recess in the fixedrim When the tireis in position on the wheel. c

7. In a vehicle Wheel having a demountable rim the combination of a tirecarrying divided annular expansible demountable rim; a substantiallycylindrical faced fixed rim less in circumference externally than theinner face of the demountable rim when the latter is expanded; a. tongueformed at the under side of one end of the demountable rim; a forliformed at the under side of the other end of the demountable rim toreceive the tongue, a hole being formed through the sides of the fork;and a Wedge adapted to be driven into said hole to engage the tongue andexpand the demountable rim.

8. In a vehicle Wheel having a demountable rim the combination of a tirecarrying divided. annular expansible demountable rim; a `substantiallycylindrical faced fixed rim less in circumference externally than theinner face of the demountable rim When the latter is expanded; a tongueformed at the under side of one end of the demountable rim; a forkformed at the under side of the other end of the demountable rim toreceive-the tongue; two holes being formed through the sides of thefork; and a Wedge adapted to be driven into said holes to4 engage thetongue to expand or. contract the demountable rim, the tongue beingsuitably formed for engagement by the Wedge.

9. n avehicle Wheel havinga demountable rim the combination of a tirecarrying metal rim; a felly; an annular recessed metal rim on the felly;and a cushion of comparatively elastic material set 'in said recessbetween the felly rim and the tire carrying rim. A

l0. In a vehicle wheel'having a demountable rim the combination of atire carrying metal rim; a folly; a metal rim on the felly; and acompressed iber cushion between the rim and the tire carrying rim.

-11. Devices for supporting a tire in iniated conditionwvhiledisassociated from its Wheel, 'said devices comprising a supplementalrim and a removable piece the with drawal of which permits the inflationpres? vsure ofthe tire to be transmitted to theV periphery 'of theWheel.

Toronto Canada 13th August 1906.

PERRY E. DOOLITTLE.

Signed in the presence 0f- JOHN G. RIDOUT, CHS. BAKER.

